de Haan M, Nelson C A
University of Minnesota, Minneapolis 55455, USA.
Child Dev. 1997 Apr;68(2):187-210.
Event-related potentials (ERPs) were recorded from 6-month-olds as each watched pictures of the mother's face and a stranger's face. The ERPs differed for the 2 faces, but the pattern of neural activity elicited depended on whether the mother and stranger looked different (Experiment 1, n = 22) or alike (Experiment 3, n = 22). In contrast, when different 6-month-olds were each shown 1 of these 44 pairs of faces their ERPs did not differ between the 2 faces (Experiment 2, n = 22, and Experiment 4, n = 22). In a visual preference test of recognition, infants showed no evidence of recognizing the mother's face (Experiment 5, n = 32). Together, these results suggest that infants are able to recognize their mothers' faces but (1) the neural processes accompanying recognition depend on the difficulty with which mother can be discriminated from stranger and (2) under the conditions investigated in this study, ERPs are a more sensitive measure of recognition than is looking time.
在6个月大的婴儿观看母亲的脸和陌生人的脸的图片时，记录了与事件相关的电位（ERP）。这两张脸的ERP不同，但引发的神经活动模式取决于母亲和陌生人看起来是否不同（实验1，n = 22）或相似（实验3，n = 22）。相比之下，当不同的6个月大婴儿分别观看这44对脸中的一对时，两张脸的ERP没有差异（实验2，n = 22，实验4，n = 22）。在识别的视觉偏好测试中，婴儿没有表现出识别母亲脸的迹象（实验5，n = 32）。这些结果共同表明，婴儿能够识别母亲的脸，但（1）伴随识别的神经过程取决于将母亲与陌生人区分开的难度，并且（2）在本研究调查的条件下，ERP是比注视时间更敏感的识别测量指标。
